fixes #2359 - update EPEL release number
fixes #2367 - Ruby 2.0 support

* require bundler 1.3, preventing ruby-debug19 getting installed on Ruby 2
* update 1.9 gems to install on 2.0 too
* don't use empty arrays in Hash constructor, causes ArgumentError
fixes #2410 - Set auditable type to 'Host'
Fixes #2408: don't try to reset the password in rake permissions:reset if Facter.domain is nil
fixes #2407 - Add STI to settings model

Also adds some tests for rendering new/missing STI models, and
refactors the old default_settings loader into the new sub-models.